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WinVerifyTrust API

Posted on 1997-03-08
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Last Modified: 2013-11-19
What do you need in your development environment to
use the WinVerifyTrust() API? When I use the API it
gives an error 'linked to missing export ADVAPI32.DLL:
WinVerifyTrust'.

The following sample code is used in a simple
dialog box app to test the API. I have a personal
and private key to digitally sign code with. I have
tested the keys out using the tools in the ActiveX
SDK. The error happens when I run the test app,
not when the API is being invoked.

// Test the Win Veriy Trust API
void CWinVerifyDlg::OnTestButton()
{
   HRESULT hResult;
   GUID ActionID;
   GUID SubjectType = WIN_TRUST_SUBJTYPE_PE_IMAGE;
   WIN_TRUST_ACTDATA_SUBJECT_ONLY ActionData;
   WIN_TRUST_SUBJECT_FILE SubjectFile;

   SubjectFile.hFile = 0;
   SubjectFile.lpPath = (LPCWSTR)"\\Test\\Authent\\SwUpdate.exe";
   ActionData.SubjectType = &SubjectType;
   ActionData.Subject = &SubjectFile;
   
   hResult = ::WinVerifyTrust      (this->GetSafeHwnd (), &ActionID, &ActionData);
   switch (hResult)
   {
      case ERROR_SUCCESS:
         AfxMessageBox ("Trusted Code!");
         break;
      case TRUST_E_SUBJECT_NOT_TRUSTED:
         AfxMessageBox ("Not Trusted Code!");
         break;
      case TRUST_E_PROVIDER_UNKNOWN:
         AfxMessageBox ("Provider Unknown!");
         break;
      case TRUST_E_ACTION_UNKNOWN:
         AfxMessageBox ("Action Unknown!");
         break;
      case TRUST_E_SUBJECT_FORM_UNKNOWN:
         AfxMessageBox ("Form Unknown!");
         break;
      default:
         AfxMessageBox ("Error Unknown!");
         break;
   }
}
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Question by:mreha
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1 Comment
 
LVL 11

Accepted Solution

by:
mikeblas earned 70 total points
ID: 1300224
It sounds like you're using a beta version of the ActiveX SDK.  You should upgrade to a supported version.

The WinVerifyTrust() function isn't implemented by ADVAPI32.DLL.  It is, instead, implemented by WINTRUST.DLL.  From the symptoms you describe, it sounds like you've got a bad version of ADVAPI32.LIB, and you need to find a copy of WINTRUST.LIB (and, at runtime, WINTRUST.DLL) that has the function exported.

This line of code, by the way:

   SubjectFile.lpPath = (LPCWSTR)"\\Test\\Authent\\SwUpdate.exe";

includes an invalid cast. You should have coded:

   SubjectFile.lpPath = L"\\Test\\Authent\\SwUpdate.exe";

.B ekiM

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